Q: Is 642,124 a Prime Number?
A: No, 642,124 is not a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 642124 can be evenly divided by 1 2 4 7 14 17 19 28 34 38 68 71 76 119 133 142 238 266 284 323 476 497 532 646 994 1,207 1,292 1,349 1,988 2,261 2,414 2,698 4,522 4,828 5,396 8,449 9,044 9,443 16,898 18,886 22,933 33,796 37,772 45,866 91,732 160,531 321,062 and 642,124, with no remainder.
Since 642,124 cannot be divided by just 1 and 642,124, it is not a prime number.